<template>
  <el-form
    ref="form"
    v-if="model"
    :validate-on-rule-change="false"
    :model="model"
    :rules="rules"
    v-bind="$attrs"
  >
    <template v-for="(item, index) in options" :key="index">
      <el-form-item
        v-if="!item.children || !item.children.length"
        :prop="item.prop"
        :label="item.label"
      >
        <component
          v-if="item.type !== 'upload' && item.type !== 'editor'"
          v-bind="item.attrs"
          :is="`el-${item.type}`"
          :placeholder="item.placeholder"
          v-model="model[item.prop]"
        >
        </component>
        <el-upload
          v-if="item.type === 'upload'"
          v-bind="item.uploadAttrs"
          :on-preview="onPreview"
          :on-remove="onRemove"
          :on-success="onSuccess"
          :on-error="onError"
          :on-progress="onProgress"
          :on-change="onChange"
          :before-upload="beforeUpload"
          :before-remove="beforeRemove"
          :http-request="httpRequest"
          :on-exceed="onExceed"
        >
          <slot name="uploadArea"></slot>
          <slot name="uploadTip"></slot>
        </el-upload>

        <div class="full-screen-container" style="border: 1px solid #dcdfe6">
          <div
            id="toolbar"
            v-if="item.type === 'editor'"
            style="z-index: 101; border-bottom: 1px solid #dcdfe6"
          ></div>
          <div
            id="editor"
            v-if="item.type === 'editor'"
            style="height: 200px; z-index: 100"
          ></div>
        </div>
      </el-form-item>
      <el-form-item
        v-if="item.children && item.children.length"
        :prop="item.prop"
        :label="item.label"
      >
        <component
          v-bind="item.attrs"
          :is="`el-${item.type}`"
          :placeholder="item.placeholder"
          v-model="model[item.prop]"
        >
          <component
            v-for="(child, i) in item.children"
            :key="i"
            :is="`el-${child.type}`"
            :label="child.label"
            :value="child.value"
          >
          </component>
        </component>
      </el-form-item>
    </template>
    <el-form-item>
      <slot name="action" :form="form" :model="model"></slot>
    </el-form-item>
  </el-form>
</template>

<script lang="ts" setup>
import { PropType, ref, onMounted, watch, nextTick } from "vue";
import { FormOptions, FormInstance } from "./types/types";
import cloneDeep from "lodash/cloneDeep";
import "@wangeditor/editor/dist/css/style.css";
import {
  createEditor,
  createToolbar,
  IEditorConfig,
  IDomEditor,
} from "@wangeditor/editor";

let props = defineProps({
  // 表单的配置项
  options: {
    type: Array as PropType<FormOptions[]>,
    required: true,
  },
  // 用户自定义上传方法
  httpRequest: {
    type: Function,
  },
});

let emits = defineEmits([
  "on-preview",
  "on-remove",
  "on-success",
  "on-error",
  "on-progress",
  "on-change",
  "before-upload",
  "before-remove",
  "on-exceed",
]);

let model = ref<any>(null);
let rules = ref<any>(null);
let edit = ref();

let form = ref<FormInstance | null>();

// 初始化表单方法
let initForm = () => {
  if (props.options && props.options.length) {
    let m: any = { username: "", password: "" };
    let r: any = {};
    props.options.map((item: FormOptions) => {
      m[item.prop!] = item.value;
      r[item.prop!] = item.rules;
      // 初始化富文本编辑器
      if (item.type === "editor") {
        nextTick(() => {
          if (
            document.getElementById("editor") &&
            document.getElementById("toolbar")
          ) {
            const editorConfig: Partial<IEditorConfig> = {};
            editorConfig.placeholder = item.placeholder!;
            editorConfig.onChange = (editor: IDomEditor) => {
              // 当编辑器选区、内容变化时，即触发
              // console.log('content', editor.children)
              // console.log('html', editor.getHtml())
              // console.log('text', editor.getText());

              model.value[item.prop!] = editor.getHtml();
            };

            // 创建编辑器
            const editor = createEditor({
              selector: "#editor",
              config: editorConfig,
              mode: "default", // 或 'simple' 参考下文
            });
            // 创建工具栏
            const toolbar = createToolbar({
              editor,
              selector: "#toolbar",
              mode: "default", // 或 'simple' 参考下文
            });
            edit.value = editor;
          }
        });
      }
    });
    model.value = cloneDeep(m);
    rules.value = cloneDeep(r);
  }
};
onMounted(() => {
  initForm();
});

// 组件重写表单重置的方法
let resetFields = () => {
  // 1、重置element-plus 的表单
  form.value!.resetFields();
  // 2、重置富文本编辑器的内容
  if (props.options && props.options.length) {
    // 清空富文本内容
    edit.value.clear();
  }
};

// 表单验证
let validate = () => {
  return form.value!.validate;
};

// 获取表单数据
let getFormData = () => {
  return model.value;
};

// 使用vue3的新api 分发方法，它替代了之前的$children方法
defineExpose({
  resetFields,
  validate,
  getFormData,
});

// 监听父组件传递过来的options
watch(
  () => props.options,
  () => {
    initForm();
  },
  { deep: true }
);

// 上传组件的所以方法
let onPreview = (file: File) => {
  emits("on-preview", file);
};

let onRemove = (file: File, fileList: FileList) => {
  emits("on-remove", { file, fileList });
};

let onSuccess = (response: any, file: File, fileList: FileList) => {
  // 上传图片成功， 给表单上传项赋值
  let uploadItem = props.options.find((item) => item.type === "upload")!;
  model.value[uploadItem.prop!] = { response, file, fileList };
  emits("on-success", { response, file, fileList });
};

let onError = (err: any, file: File, fileList: FileList) => {
  emits("on-error", { err, file, fileList });
};

let onProgress = (event: any, file: File, fileList: FileList) => {
  emits("on-progress", { event, file, fileList });
};

let onChange = (file: File, fileList: FileList) => {
  emits("on-change", { file, fileList });
};

let beforeUpload = (file: File) => {
  emits("before-upload", file);
};

let beforeRemove = (file: File, fileList: FileList) => {
  emits("before-remove", { file, fileList });
};

let onExceed = (file: File, fileList: FileList) => {
  emits("on-exceed", { file, fileList });
};
</script>

<style lang="" scoped>
</style>